2 Ways to make a Clap switch
Imagine how cool it would be if every electronic gadgets can be operated with your clap only. Now You can do that with your own hand.
Here we gives you a very interesting circuit of clap switch. With the help of this circuit you can turn ON and OFF any circuit just by clapping.
1. Clap switch with transistors, diodes and resistance
In this circuit, transistor Q2 and Q3 are wired in monostable mode. Transistor Q4 is the driver transistor for the relay and the transistor Q1 amplifies the signal picked up by the condenser mic.
Thus any bulb or bell or buzzer or any electronic gadgets connected to the relay can be turned ON just by a clap and or the next clap it can be turned OFF.
This circuit employs some very simple and cheap circuitry, and a simple program. It is relatively easy to make a hardware only clap on/off circuit,
Things you will need :
2.Clap switch with IC1 NE 555 & IC2 CD4017
As the above project is highly depends on resistance to operate so there might be some problem with stability which is negligible but still if you need a highly Bi stable clap switch then here is another circuit diagram for you.
Here we use two integrated circuits to make a bistable switch.
There is another circuit diagram for a more advanced clap switch along with relays connected through it.
How it Works :
Along with some of the other components, this circuit is mainly based on the two ICs i.e. NE555 timer along with CD4017.
IC NE555 timer in this circuit is wired like a monostable oscillator. For this circuit, IC NE555 monostable produces a clock pulse, which is used to give an oscillating wave at IC1 pin 3 which is an output pin. Monostable contains only one steady state and all we need is to trigger it externally to return it in reverse direction to its original state. So, utimately this IC is working as switch which forwards an electronic pulse signal to second IC i.e. IC CD4017
And consequently the CD4017 which is a CMOS counter/divider IC, it receives a clock signal through the clock input and in the sequential manner it turns ON all the 10 outputs, every time it gets the clock input pulse.
In order to get familiar with the working of the IC, it is essential for the one to get familiar with the every pin of the IC. These IC consist of 3 input pins along with 10 output pins also have one pin for ground and one more for the power supply and one more pin for the Carry out. Pin diagram of the IC is designed below –
- · Input Pin: This is the pin where the electronic pulse forwarded by IC NE555 enters.
- · Reset Pin (Pin 15) – The counter is reset to the zero position by this pin. Suppose you wish that the counter will only count till third position then you need linked the fourth pin with 15 pin. So after reaching to the third output it will automatically begin its counting from zero.
- · Clock Pin (Pin14) – In each of the timing pin 14 moves at high the output will be given to you. From the initial clock pulse output will be received at the pin 3 likewise for the next clock pulse output will be received at the pin 2 and so on.
- · Clock Inhibit Pin (Pin 13) – The counter is switched to “on” and “off” by this pin. If you need that the counter to be switched off then for that pin 13 must be at high state. If the pin is at high then it will disregard the clock pulse without paying attention that how much time you press the switch i.e. the count will not go forward. Pin 13 in our circuit is grounded.
- · Output Pin (Pin Q0- Q9) -It is used to get the input in chronological order. Like pin 3 will give you the output for the first pulse and so on.
- · Ground Pin (Pin 8) and Supply pin (pin 16) – For the proper working of these IC these pins are used to give ground as well as power supply.
- · Carry out Pin (Pin 12) – These pins are used to link one or more CD4017 IC with each other. Suppose you have a desire to connect one more CD4017 IC then attach pin 12 to the clock input to its next one. The carry pin of first CD4017 is connected to clock input of the second and the carry pin of the second is connected to the clock input of the third and so on. In our circuit we left this pin as we have desire of only one IC in our circuit. In both cases you almost needs the same things except the IC NE 555 & IC CD4017
Good luck guys :)
And hope you guys enjoy .
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